Sio as a Baby Name. Meaning and Origin of Sio

What is the meaning of the name Sio ?

The baby name Sio is a Unisex name , 2 syllables long and is pronounced SHEE-oh (ˈʃiː.oʊ),SEE-oh (ˈsiː.oʊ),Japanese: shi-O (ɕi.o).

Sio is Irish, Japanese in Origin.

Sio is a compact, cross‑cultural given name with several roots. In Polynesian communities (notably Tongan and Samoan), it functions as a familiar short form of Sione or Ioane, local equivalents of John derived from Hebrew Yohanan, “Yahweh is gracious.” In these contexts Sio has moved from nickname to independent use, appearing in church records and modern athletics rosters across the 20th–21st centuries.

Elsewhere, Sio reflects different naming traditions. In Welsh it can act as a pet form of Siôn/Sion (John). In Japanese it appears as an alternative romanization of Shio, a feminine or unisex name whose meaning depends on kanji, often “salt,” “tide,” or “ebb and flow.” The spelling also occurs in Chinese–Macanese romanization systems, sometimes within compound given names or surnames. Variants and cognates include Shio, Sione, Siôn, Sion, Ioane, Ioan, Seán/Sean, and John. Meanings therefore range from “God is gracious” to nature‑themed senses like “salt” or “tide.”